CAJ | 학술논문

以北京十三陵林场侧柏人工林13块样地资料为依据,研究其林分结构的特点和规律.结果表明,侧柏林林分平均密度为1 535株/hm2,平均高6.2 m,断面积平均胸径为10.9 cm,平均断面积为14.69 m~2/hm~2,平均蓄积量为56.75 m~3/hm~2.应用正态分布、Weibul1分布、对数正态分布、Gamma分布和Beta分布拟合直径和树高结构,发现正态分布和Weibull分布拟合直径分布和树高分布效果最好,也符合人工林的林分结构规律.侧柏人工林层次结构简单,物种多样性低,乔木层、灌木层和草本层的Shannon-Weiner指数、均匀度指数平均值分别为0.85、0.58,0.75、0.39,0.78、0.58.在0～30 cm阶段,更新幼苗以鹅耳枥、臭椿、槲树和栓皮枥为主;在30～50 cm阶段,更新幼苗以槲树为主要更新树种;在50 cm以上阶段,更新幼苗以侧柏、黄栌等喜光性树种为主,且每公顷50 cm以上株数占总株数的55.5%.同时提出了"近自然森林经营"部分建议.
이북경십삼릉림장측백인공림13괴양지자료위의거,연구기림분결구적특점화규률.결과표명,측백림림분평균밀도위1 535주/hm2,평균고6.2 m,단면적평균흉경위10.9 cm,평균단면적위14.69 m~2/hm~2,평균축적량위56.75 m~3/hm~2.응용정태분포、Weibul1분포、대수정태분포、Gamma분포화Beta분포의합직경화수고결구,발현정태분포화Weibull분포의합직경분포화수고분포효과최호,야부합인공림적림분결구규률.측백인공림층차결구간단,물충다양성저,교목층、관목층화초본층적Shannon-Weiner지수、균균도지수평균치분별위0.85、0.58,0.75、0.39,0.78、0.58.재0～30 cm계단,경신유묘이아이력、취춘、곡수화전피력위주;재30～50 cm계단,경신유묘이곡수위주요경신수충;재50 cm이상계단,경신유묘이측백、황로등희광성수충위주,차매공경50 cm이상주수점총주수적55.5%.동시제출료"근자연삼림경영"부분건의.
Thirteen sample plots were investigated to study the structure and the characteristics of Platycladus orientalis plantation samples in Shisanling forest farm of Beijing. The results showed that the average density, average height, the quadratic average diameter at breast height, average basal area and the average stocking volume of the stand were 1 535 per hm2, 6.2 m,10.9 cm, 14.69 m~2/hm~2 and 56.75 m~3/hm~2 respectively. Using normal distribution, Weibull distribution, log-normal distribution, Gamma distribution, Beta distribution for describing the structure of height and diameter of Platycladus orientalis plantation, it was found that normal distribution and Weibull distribution were the best functions to depict the structure of height and diameter. And the results accorded with the law of the forest plantation. The forest structure of Platycladus orientalis plantation was simple with low biodiversity in tree, shrub, and herbaceous layers. Shannon-Weiner diversity index and evenness index were 0.85 and 0.58 at tree layer, 0.75 and 0.39 at shrub layer, and 0.78 and 0.58 at herb layer respectively. Carpinus turczaninowii,Ailanthus altissima,Quercus dentate and Quercus variabilis were dominant in the layer of 0-30 cm. Quercus dentate was dominant in the layer of 30-50 cm and Platycladus orientalis and Cotinus coggygria were dominant in the layer of higher than 50 cm. The number of seedlings higher than 50 cm accounted for 55.5 percent of the total number of seedlings. Management suggestions based on close-to-nature forest management were proposed.